633428149 has 2 divisors, whose sum is σ = 633428150. Its totient is φ = 633428148.

The previous prime is 633428129. The next prime is 633428171. The reversal of 633428149 is 941824336.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587092900 + 46335249 = 24230^2 + 6807^2 .

It is a cyclic number.

It is not a de Polignac number, because 633428149 - 2¹³ = 633419957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633428129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316714074 + 316714075.

It is an arithmetic number, because the mean of its divisors is an integer number (316714075).

Almost surely, 2^633428149 is an apocalyptic number.

It is an amenable number.

633428149 is a deficient number, since it is larger than the sum of its proper divisors (1).

633428149 is an equidigital number, since it uses as much as digits as its factorization.

633428149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 40.

The square root of 633428149 is about 25167.9985100127. The cubic root of 633428149 is about 858.8140083385.

The spelling of 633428149 in words is "six hundred thirty-three million, four hundred twenty-eight thousand, one hundred forty-nine".